Status: One section (800D) is signed, the rest unsigned, associated with MD 75.

The old alignment of MD 75 between Union Bridge and New Windsor. The SHA database does not have their names. East of MD 84, part of the old 75 was taken over by 84 itself,
instead of becoming a section of 800. A small stub, MD 800A, branches from this section.

Sections of MD 800: MD 800A: Mill Dale Ln 0.05 mi.; from MD 84 east to road end.MD 800B: S Clear Ridge Rd 0.20 mi.; from MD 75 north to MD 84.MD 800C: (no name) 0.07 mi.; two dead ends in front of St Luke's Lutheran Church. Connected with a driveway, and just west of 800BMD 800D: Watson Ln 1.57 mi.; This is the signed section, and manages to stray a bit from MD 75.MD 800E: 0.03 mi.; from Stem Rd east to road end.

A former piece of MD 8 that runs through a small residential area. Calling it an associated route of MD 8 is a little of a stretch, as it only appears once, not
as a repeated bunch of little suffixed sections all up and down its path.

Edgar Price Rd is a frontage east of 301 to reconnect its former alignment, now cut off by 301, to MD 299. The route description is taken verbatim from the RTDS. CO 333 is
used as the county route designation for Edgar Price Rd. There was probably an intervening county section en route to the Delaware border. Dropped in one of the last actions of the 1970s.
Its southern end parallels US 301 opposite the new weigh station.

MD 806 is our catch-all for old US 15 aligments and connectors. Though it's the portion north of Frederick to Thurmont that's signed, there was also once a piece of 806 south of Frederick. US 15 hadn't been rerouted along part of US 340 yet, so when it was routed along I-270 to the Frederick Freeway, that part north of I-270 became an 806 segment. When it did happen, the entire old US 15, including the new 806, became MD 85.

Sections of MD 806: MD 806A: Catoctin Furnace Rd 3.04 mi.; from US 15 north to southern limits of Thurmont. Runs east of current US 15.MD 806D: 0.29 mi.; north off MD 76. Decommissioned 1978, transferred to Mount St. Mary's College.MD 806E: 0.21 mi.; US 15 at entrance to Mount St. Mary's College. Decommissioned 1978, transferred to Mount St. Mary's College.MD 806I: (no name) 0.53 mi.; from dead end north to Willow Rd. Paralles US 15 to the west.MD 806N: (no name) 0.56 mi.; from Hayward Rd in Frederick north to cul-de-sac. Parallels US 15 to the west, just south of 806I.MD 806O: (no name) 0.04 mi.; from road end north to road end. Intersects Lohr RdMD 806R: Albert Staub Rd, Emmitsburg Rd 1.01 mi.; from MD 550 north to Roddy Creek Rd. Albert Staub Rd added to extend MD 806 to Roddy Creek Rd for a right-angle intersection with US 15. Roddy Creek Rd features a covered bridge.

Though it's not listed as under state maintenance, MD 806 is signed north of Thurmont, even being dual-signed with 550.

MD 807 comprises the old alignments, spurs and stubs of US 220, Bedford Road, north of Cumberland.

Sections of MD 807: MD 807: Bedford Rd 3.52 mi.; from northern limits of Cumberland north to US 220.MD 807A: Naves Cross Rd 0.10 mi.; from MD 144 (Christie Rd) east to end of state maintenance at Mason Rd. This piece has been part of US 220, and before that, MD 395. Though officially now 807A, is signed as MD 144.MD 807B: Bedford Rd 0.38 mi.; from MD 807 north to cul-de-sac.MD 807C: (no name) 0.10 mi.; from US 220 south to cul-de-sac near Centenay United Methodist Church.MD 807D: Pine Ridge Rd 0.23 mi.; from US 200 north to end of state maintenance.MD 807E: Smouses Mill Rd 0.06 mi.; from start of maintenance at Hazen Rd (former MD 48) north to US 220 at MD 807.

MD 808 is the old 27 through Mount Airy. Part of Main Street forms the Frederick-Carroll County boundary through the center of town, though
the SHA data has Main Street as being entirely in Carroll County for inventory purposes.

MD 810 is used for the frontage roads either side of MD 210. It's relatively modern, so there aren't any old alignments of 210, not yet.
The sections of 810 intermingle with the suffixed section of MD 210.

Sections of MD 810: MD 810A: Livingston Rd 0.16 mi.; from entrance of electric substation north to end of state maintenance near MD 210J (service road).MD 810B: Spring Grove Dr 0.04 mi.; from MD 210K (Beech La) east to end of maintenance.MD 810C: Dale La 0.04 mi.; from MD 210K (Beech La) east to end of maintenance.MD 810D: Maple La 0.04 mi.; from MD 210K (Beech La) east to end of maintenance..MD 810E: Pine Dr 0.08 mi.; from start of maintenance south to MD 210K (Beech La).MD 810F: Holly Way 0.10 mi.; from start of maintenance south to end of maintenance at MD 810G.MD 810G: Pine La 0.06 mi.; from start of maintenance at MD 810F east to MD 210.MD 810H: Manning Rd W 0.11 mi.; from start of maintenance south to MD 210.MD 810I: Manning Rd E 0.69 mi.; from MD 210 south to end of maintenance 0.04 miles past MD 228.MD 810J: Livingston Rd 0.10 mi.; from MD 210/MD 373 west to end of maintenance at MD 210S (Biddle Rd).MD 810K: Brian Point Rd 0.10 mi.; from road end west to end of maintenance at MD 210S (Biddle Rd).

MD 812 is a former alignment of MD 213 through Cherry Hill, and MD 280 before that. As on other Cecil County routes, there is plenty of room to bypass mildly developed hamlets like
Cherry Hill with a new alignment.

Although there is an extant section of 813 in Wicomico County (numbered similar to 313), the number was
mostly used for an old piece of MD 276 in Cecil County.

Sections of MD 813: MD 813: (CE) 0.25 mi.; from MD 276 to MD 276. old alignment south of MD 813AMD 813A: Harrisville Rd (CE) 2.09 mi.; from Road End N to MD 273. Despite being dropped in 1979, MD 269 ended here until its demise in 1984.MD 813F: Twiford Rd (WI) 0.12 mi.; from State St south across MD 313 to end of maintenance.

MD 815 is an old alignment of MD 349, bypassed due to a tight bend. Though it's inventoried east-west, MD 815 is signed north-south.
Eastward is signed north, westward is signed as south. The route east of Parsons Road may be one way westbound; it's looks more like a ramp on the map, and all turn movements onto
MD 349 can be done from Parsons Rd.

Became CO 369 according to the RTDS, so that gives us: Old Madison Rd. In the current SHA database, it loops with MD 16 as the old 816 did.
Madison is on the Little Choptank River along MD 16, west of Church Creek (where MD 16 splits with MD 335.)

MD 817 consists of two sections of MD 16-331 through Linchester, south of Preston.

Sections of MD 817: MD 817A: Linchester Rd 0.46 mi.; from MD 16-331 north back to MD 16-331. Connected on the north end by MD 331A.MD 817B: Langrell Rd 0.52 mi.; from MD 318 north to road end 0.13 miles past Seaman Rd.

Route 818 is the old, pre-bypass routing of US 113 through Berlin. The number
probably dates from the time of construction of the new 4-lane US 113 east of
town (late 60s?), relieving the burden of eastern Delmarva north-south traffic
through Berlin.